Improved metallic roofing



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Letters Patent No. 90,667, dated .Tune 1, 1869.

v IMPROVED METALLIC ROOFING.

The Schedule referred to in these Letters Patent and making part of the same.

To all persons to whom these presents may come:

Be it known that I, JOHN W. KINGMAN, of North Bridgewater, in the county of Plymouth, and State of Massachusetts, have invented a new and useful Improvement' in Metallic Roofing or Sheathing; and dohereby declare `the same` to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure l denotes a top View of my improved rooting or sheathing; K

Figure 2 is -a vertical section of. it;

Figure 3 is another vertical section; and

Figure 4 is a transverse section of it.

` The nature of my invention consists in a peculiar arrangement of water-proof strips, such as hair-felt saturated with an oil-paint, with jointed `plates, and their fastening-nail, and the roof or'surface to which the same may be applied.

When zinc or other metallic plates are laid together ona roof, so that the edge of one overlaps that ott-he other, and nails are driven through the lapped parts, and into the roof, in order to conne the two sheets together, and to the roof', water, b'y capillary attraction, is liable, during 'rainy weather, to be drawn between the 'lapped parts of the plates, and around the shauks of the nails, the same causing oxidation of th said shanks near the heads.

This oxidation of the nail-Shanks, close to the heads,

is believed to be due not merely to the oxygen. of the water, but to electric currents, induced bythe differeut metals of which the sheathing-plates and the nails arecomposed, when there may be water between the laps of the plates. v

ln the sheathing of Vessels, the naiLheads are very liable to become separated from their Shanks, by reason of oxidation of the'latter close to the heads, such being due to electrical clurrents and the corrosive action ot' the water which may gain access to the shank.

I have found, by interposing between the laps of the plates a strip of hair-felt saturated with oil-paint, or some suitable water-proof equivalent, capable of drying hard, and driving the fastening-nails through the laps and strip, Yand into the roof or surface to be sheathed, that I not only prevent the Water from getting into the joint, and oxidizing the nail-shanks at or near the heads, but l completely prevent the water from working under the cap-plate, and between itand `the roof-snriacefso as to cause rot or decay and leakage of the latter.

In fact, my improvement, when tinned plates are used, saves the usual clinching of the plates, and the employment of solder'at the junction of the laps.

, With my invention, arbox of tinned-iron plate, containing one hundred and twelve sheets, fourteen by twenty inches each, will cover about twenty-one square feet more of roof-surface than it will by the usual pro cess of clinching and soldering, and, besides this, the sheathing will he better in every respect.

Another mode in which I have contemplated the application of the yprinciple of myinvention is, to extend the strip ot' saturated felt over the joint of the plate or over the laps, and a short distance beyond the outer edge of the outer lap, so as to lap on both plates and cover the joint, after which I place on the strip of felt a strip of metal, of like width, and, by means of nails driven through the strips, I confine the whole to the roof or surface to be sheathed. In this way the edges of the plates, at the joint, may be protected to better advantage.

It is known that tinned-iron plates, or what is usually termed tin-plate, generally first becomes oxidat-ed at its y edges, particularly where the iron is exposed without any covering of tin.-

In this last-named mode of applying my invention,

these edges will 'be eiiectually covered by the felt, such mode of application being specially useful for what are termed up-and-down joints, and their nails.

In the drawings, A B O D denote four metallic plates, applied to the boarding, E, of a roof, for instance.

The protecting-strip of felt, saturated with oil-paint,

is shown, at @,as arranged between the horizontal laps of the plates, and with. the nails b b b, 85e., driven through it and hoth'the laps. I

The protectivestrip is shown, at a', as applied to the up-and-down jointoil the plates, and as Ahaving a metallic strip, c, laidon it, the whole being confined to the boarding by nails b b -b, driven through the strips, and the laps or joint of the plates.

I do not confine my `invention to the employment of hair-felt or oil-paint, as there may be used,`in place of either, what would be an equivalent for it. This equivalent for the hairffelt may be woven cloth or wool-felt, or felt composed partly of wool and partly" of hair. Instead of the paint being made of linseed or other drying-oil, and white lead, I can use, in the place of the latter, any other proper pigment.

I claim, as an improvement in sheathing, a surface with metallic plates, the arrangement of the strips of hair-felt, saturated with oil-paint, or other' water-proof drying-equivalent, with the jointed-or lapped plates,

`their fastening-nails, and the roof' or vsurface to which the same may be applied.`

. y I claim the arrangement of they auxiliary plate o r strip the strip of hair-felt, its saturating-material or oil-paint, the jointed or overlapped plates, the fastening-nails, and the roof or surface to which the same may be applied, the whole being substantially as hereiubefore set forth.

Witnesses R. H. EDDY, l. F. P. HALE, Jr.

' JOHN w. inneflvmn. 

